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Upgrade HTPC

I use MPC-HC or PotPlayer to listen to my x265 1080p movie I got no problem at all ... the CPU almost sleep but when I try a x265 4K my CPU top the 100% even with my RX460 ... there is a way to use in a better way my RX460 to help my less powerful CPU to read 4K video file ??? or really my Q9400 is my bottleneck and I can?t think there is a way to read 4K x265 file on it ... if it?s the case do you have a suggestion for me about a good CPU + MOBO to update my HTPC.

My gaming rig has a i7 3770K with a ASUS Sabertooth Z77 mobo .... must I just swap these in my HTPC and upgrade my gaming rig with a new mobo + CPU + Ram ???

Are you looking for the max image quality or you are fine with normal fine quality ? ( with CPU decoding and software based chroma subsampling you can get better image quality than with GPU accelerated decoding )

What is your actual goal ? to play x265 4K movie on my near future 4K LG B6P

You have a 1080p TV.
You are trying to playback a 4k file to it ? yes right now I play these 4K movie on my 1080P TV

Are you restricted to h.265 video files ? ( limited storage ? capped internet ? ) because right they do the job ... faster to download (torrent) but if you have better movie file for quality I'm here to learn ... so teach me please

Are you looking for the max image quality or you are fine with normal fine quality ? ( with CPU decoding and software based chroma subsampling you can get better image quality than with GPU accelerated decoding )

if it's possible for me a really like the max image quality possible ... if you can recommend me a CPU and a software to do all of it it will be nice

Why it's not my RX460 taking all that stress to downscale and avoid the lag created by the 100% usage of the CPU ... there is a way to push all that stress on my modern video card that I buy just for that

Why it's not my RX460 taking all that stress to downscale and avoid the lag created by the 100% usage of the CPU ... there is a way to push all that stress on my modern video card that I buy just for that

That can't be done.
There's no way to have the GPU do the downscaling while the CPU or any other hardware part do the decoding, deblocking, etc.

Sorry for the short comments, my time is very limited here.
Will try to give you a detailed post and suggestions tomorrow hopefully

Pick up a Core i5 CPU, any generation, be it a 2500K, a 3570K, 4670K, 6600K, 7600K.
8GB ( 2*4GB ) of DDR3-1600 or DDR4-2400 RAM depending on the CPU + mobo you purchase
a nice micro-ATX or ATX motherboard to go with the CPU you pick ( fantastic value choices and great performance/reliability goes to ASRock IMHO )
a GTX 1060
a semi-decent SSD ( something like a 850 Pro by Samsung ) for the OS + apps
your storage solution

this will allow you to get the most out of your 4k TV.
4k material will playback smoothly and with nice motion ( MadVR helps with that and so does the GTX 1060 with its "cleaner" refresh rate )
non-4k material will be upscaled better ( better image quality and smoother motion )

Since you are going for the best image quality, you should also invest in a TV calibration by a professional ( $150-200 per input ).
Or if you are tech savvy and can figure out things with some practice, you can get a pretty accurate calibration hardware set and do the calibration yourself ( ColorMunki Display colorimeter for the IRE0 to IRE30 measurements and the i1pro for the IRE40-100 and color mesurements ).
Calibration will give you a much better and true playback ( accurate colors and luminosity like the filmographer wanted and "developed" it ) and on the side, you'll also get lower power consumption on your TV/projector.

I work a lot this morning to configure my PotPlayer + MadVR. I able now to listen my x265 4K video on my HTPC without any lag with the image. My CPU drop to around 40% on use ... but now my RX460 is almost anytime 100% ... but right now ... my audio isn't synchro with the image ... it's like if my audio has a lag

do you have any idea why ... I select my Creative SB X-FI / Virtual Dolby Decoder / 24 bits / 96000hz / High Quality in the audio setting of PotPlayer and in the configuration of integreted audio decoder ... I choose FFmpeg64.dll

Pick up a Core i5 CPU, any generation, be it a 2500K, a 3570K, 4670K, 6600K, 7600K.
8GB ( 2*4GB ) of DDR3-1600 or DDR4-2400 RAM depending on the CPU + mobo you purchase
a nice micro-ATX or ATX motherboard to go with the CPU you pick ( fantastic value choices and great performance/reliability goes to ASRock IMHO )
a GTX 1060
a semi-decent SSD ( something like a 850 Pro by Samsung ) for the OS + apps
your storage solution

this will allow you to get the most out of your 4k TV.
4k material will playback smoothly and with nice motion ( MadVR helps with that and so does the GTX 1060 with its "cleaner" refresh rate )
non-4k material will be upscaled better ( better image quality and smoother motion )

Since you are going for the best image quality, you should also invest in a TV calibration by a professional ( $150-200 per input ).
Or if you are tech savvy and can figure out things with some practice, you can get a pretty accurate calibration hardware set and do the calibration yourself ( ColorMunki Display colorimeter for the IRE0 to IRE30 measurements and the i1pro for the IRE40-100 and color mesurements ).
Calibration will give you a much better and true playback ( accurate colors and luminosity like the filmographer wanted and "developed" it ) and on the side, you'll also get lower power consumption on your TV/projector.

You need to install MadVR.
I assume that you've downloaded the latest version and extracted it somewhere ( in Program Files or Program Files (x86) ideally ), but you haven't run the install.bat ( batch file ) that is in that directory along with the rest of the MadVR files.

You need to install MadVR.
I assume that you've downloaded the latest version and extracted it somewhere ( in Program Files or Program Files (x86) ideally ), but you haven't run the install.bat ( batch file ) that is in that directory along with the rest of the MadVR files.

Run the batch file and in the next launch of MPC-HC it will show up

Yes sir I got it ... but on my HTPC with my RX460 when I run my x265 4K mkv movie files ... now my GPU top at 100% ... so I have lag in the video and the sound and picture aren't synchro ... do you have any idea why ???